KB wiki-1

How do I reset a password in MediaWiki?

You'll need to use phpMyadmin or mysql at the command line to specify the following command:

 UPDATE user SET user_password =
 md5(CONCAT('123-',md5('newpassword'))) WHERE user_id=123;

 Where 123 is the user_id of the person you need to reset. The salt (first part of
 the CONCAT command) is the user_id followed by a dash. This is important!